<?php $bath=get_post_meta($post->ID, 'wtf_bath', true);
if(!empty($bath) ) { ?>
<div class="propslist"><span>Băi - </span> <span class="propval"> <?php echo $bath; ?></span></div>
<?php } ?>
Do something like this for each div !.. only display div if the data to be displayed in div is not empty !